Heartstation remote monitor system

ABSTRACT

An automated external defibrillator (AED) and AED Monitoring system made up of an AED, the AED having a self-diagnostic subroutine and performing said subroutine at regular intervals, the AED having at least an audio indicator that indicates the results of the self-diagnostic when the diagnosis is that the AED is in need of maintenance and a remote AED monitoring system, the AED monitoring system having an electromagnetic coil, microphone, battery, microprocessor, and wireless communication device, wherein the microprocessor selectively powers up the AED monitoring system prior to the AED&#39;s self-diagnostic subroutine and utilizes the electromagnetic coil and microphone to monitor for the AED&#39;s audio indicator that the AED is in need of maintenance, and the microprocessor transmitting a wireless signal through the wireless communication device indicating whether the AED is in need of maintenance; the microprocessor selectively powering down the AED monitoring system after transmitting the wireless signal.

CROSS-CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of co-pending U.S. patent applicationSer. No. 15/787,412, filed Oct. 18, 2017, which claims benefit of U.S.provisional patent application Ser. No. 62/410,171, filed Oct. 19, 2016.Each of the aforementioned related patent applications is hereinincorporated by reference in their entirety.

FIELD OF THE INVENTION

The present invention generally relates to automatic externaldefibrillators (AEDs) and devices and systems related to the monitoringand diagnostics thereof.

BACKGROUND

The Automated External Defibrillators (AEDs} are used all over the worldin locations such as health clubs, airports, schools, churches, officebuildings, etc. Often, these systems are intended to be installed inpermanent and semi-permanent displays, but are also carried in bags byEmergency Medical Technicians (EMTs). AEDs are generally powered byprimary lithium batteries with a life of 1 to 4 years. AEDs also requirepads that have a limited life and must be replaced if used in alifesaving event before the expiration date. At the time of purchase andinstallation of these devices, those maintaining the devices have goodintentions regarding the regular maintenance required to keep themoperational, however with the turnover of personnel managing thesedevices, and over time with this being a limited responsibility forthose assigned, they are quickly forgotten. This often leads to negativeconsequences. AEDs hang on walls with dead batteries, expired pads, andin faulty conditions. Fire departments, the FDA, and AED distributorsreport that a large percentage of these devices are forgotten within 5years and left for dead. Multiple lawsuits have resulted from rescueattempts with dead or faulty devices.

While no system can expect perfection, many AED monitors have yet tocome into the 21st century. These stations are, at best, monitored byvisual inspection of untrained (or barely trained) personnel who log thediagnostic condition using pen and paper. Such records are easy to lose,and are not easily accessible. In addition, without a good secondarychecking mechanism, entire AEDs are lost when a paper record is lost. Inaddition, when personnel changes or things get busy, these inspectionsare often forgotten.

Several large distributors of AEDs attempt to support their customers inthe maintenance of AEDs with software that notifies the safety personnelin charge of the AEDs when it is time to replace pads and batteries.This is strictly done by time on a spreadsheet, and does not actuallymonitor what is going on with the AED. The AEDs do a daily, weekly, andmonthly self test to determine if maintenance is required. If theydetermine that a problem has occurred they start beeping and display anindicator on the front of the AED that varies by AED, all in hope that apasserby notices and responds to its request for maintenance. This isunlikely if stored in a cabinet or closet unless the safety programrequires a visual inspection that is adhered to.

U.S. Pat. No. 8,565,871 ('871 Patent), which issued to Tuysserkani,discloses an Automated External Defibrillator Device with IntegratedWireless Modem. The '871 Patent describes automatic externaldefibrillator (AED) includes an integral wireless modem configured sothat, upon activation, the AED automatically connects to a wirelessnetwork and reports the event to an emergency services center or remoteserver to call for an ambulance. The activation report may beaccomplished by calling an emergency services center and playing aprerecorded voice message that includes AED location information.Alternatively, the activation report may be transmitted via a wirelessdata network to a remote server which routes the information toappropriate authorities. After the activation report is transmitted, theAED may transmit patient and treatment data to the server. The AED mayinclude a speaker phone capability so a caregiver can talk with adispatcher or medical team. The AED may also automatically reportactivation data and periodic self-diagnostic testing results to amanufacturer or service provider via a wireless data call to a remoteserver.

U.S. Pat. No. 8,854194 ('194 Patent), which issued to McSheffrey et al.,discloses Remote Monitoring. The '194 Patent essentially describesremote monitoring and inspection of measurement devices, emergencyequipment, parking spaces, and other items is accomplished by using animage sensor (e.g., a CMOS sensor) to capture an image containinginformation about the monitored item. A signal containing informationabout the image (e.g., data representing the captured image or dataindicating the state of the captured image) is transmitted to a remotecentral station.

U.S. Pat. No. 9,220,912 ('912 Patent), which issued to Elghazzawi,discloses Medical Equipment Servicing. The '912 Patent describes Systemsand techniques for centralized management and servicing of medicalequipment such as automated external defibrillators (AEDs) are describedherein. The systems and techniques for receiving status updates frommultiple automated external defibrillators, receiving, from a user, arequest to access status information, and sending, to the user, summarylevel status information for at least some of the multiple automatedexternal defibrillators, the summary level status information beinggrouped based on a measure of geographic proximity of the multipleautomated external defibrillators.

U.S. Pat. No. 9,295,849 ('849 Patent), which issued to Elghazzaiwdescribes Medical Equipment Messaging. The '849 Patent describes medicalequipment messaging.

United States Patent Application No. Re. 20110060378, which is authoredby Tuysserkani, teaches an automatic external defibrillator (AED)includes an integral wireless modem configured so that, upon activation,the AED automatically connects to a wireless network and reports theevent to an emergency services center or remote server to call for anambulance. The activation report may be accomplished by calling anemergency services center and playing a prerecorded voice message thatincludes AED location information. Alternatively, the activation reportmay be transmitted via a wireless data network to a remote server whichroutes the information to appropriate authorities. After the activationreport is transmitted, the AED may transmit patient and treatment datato the server. The AED may include a speaker phone capability so acaregiver can talk with a dispatcher or medical team. The AED may alsoautomatically report activation data and periodic self-diagnostictesting results to a manufacturer or service provider via a wirelessdata call to a remote server.

The problems with these systems, and others, are addressed by thepresent invention and discussed in greater detail below.

SUMMARY

Currently available AEDs lack many of the proposed features describedbelow. An optimal solution would be to have a means to identify when anAED goes into a fault mode and to report the problem remotely to amonitoring system. This system would then report the problem to a personthat can maintain the device without the regular, physical presence ofthe person with the AED. Preferably, one approach would be applicable toall AEDs despite various indicators of failure and various locations ofthese indicators on the AEDs. A further goal would be to have thesolution be a retrofit to all existing AED cabinets and not only newcabinets. An even further goal would be to have the device operate onbatteries, capable of at least a 5 year operation.

It is possible to use a camera as a way to monitor an AED in itscabinet. However, challenges with this approach are in being able toaccommodate multiple indicators with various AEDs. Different color andshape indicators are used. The most popular just uses a blinking greenLED. Some are in dark locations. Some AEDs are the same colors as theindicators (greens and reds}. Complex analysis would be required todistinguish a fault condition without user interaction. Also, most AEDshave their faces right against the door of the AED cabinet so there isnot room for a camera in existing cabinets. Additionally the camerawould likely have to be setup on the door and because AEDs come invarious sizes camera alignment would be tedious. Additionally, a camerarequires a significant amount of electricity to operate, resulting inbattery drain.

Thus, the present monitoring system utilizes certain features of AEDs tomonitor them and report their condition to a remote system. All AEDsturn on at a selected interval for a self inspection. Most turn on every24 hours for a quick check, every week for a more thorough selfinspection, and every month for a complete inspection. These inspectionsnot only check the batteries and pads, but also the internal functionsof the AED including the charge circuitry. Following these inspections apass or fail visual indicator is set, as well as a periodic beep in afault state.

Utilizing the inherent diagnostics of modern AEDs, the current inventiontherefore is able to monitor the state of an AED without usingsignificant power, which would result in battery drain. The basic methodto achieve this result is as follows: 1) Wake up the monitoring systemjust prior to scheduled AED self inspection; 2} Sense the turn on of theAED for its self inspection; 3) Listen for a fault signal for a definedperiod of time, and if the fault signal is discovered a fault conditionis present; 4) Report via wireless communication (Wi-Fi, Bluetooth,cellular, etc.) the outcome of monitoring; 5) Return monitoring systemto battery conservation, sleep mode.

While the above steps are, themselves, novel, there are additionalinnovations set forth in this disclosure that allow for more accurateand specific monitoring of AEDs. Functionally, most AED cabinets do nothave line power (AC outlets) to power the battery of a monitoringsystem. However, the minimum life goal of the battery for an AED monitoris 5 years. Therefore, a very low power microcontroller is used that hasthe capability to go into a deep sleep consuming only enough power towatch a timer programmed to wake up the device just prior to thescheduled self inspection of the AED. Each version of AED has a hardcoded, defined time for its inspection. For example, all Cardiac ScienceG3 AEDs do a self check at 3:03 AM. This time can be hard coded into theAED monitor on installation, but the system also has a diagnostic methodthat lets an installed AED monitor discover the diagnostic setting ofthe AED it is monitoring with no user input.

One component of the sensing system, for sensing the AED powering up forits self inspection, is a large diameter, multi-turn coil. This coilsenses the electromagnetic field generated by the AED when it powers onfor diagnostics. A microcontroller will monitor the coil at the time ofthe status check to verify that the AED is present and that the AEDbattery is not dead. If coil signal is not observed a fault status for amissing or dead battery is sent via wireless communications to an onlinemonitoring system. Knowing that the AED is present and powered, themicrocontroller then uses a microphone and waits for a series of beepsat a defined frequency for a defined period of time for the specific AED(these can be preprogrammed or learned by the AED monitor). During thisperiod if the specific set of beeps are observed, the AED is in faultmode and needs maintenance. If not, the AED has passed its selfinspection. The wireless system can send a myriad of messages to thecentral monitoring system including: 1) AED missing or dead battery; 2}AED in fault mode; 3) AED operational. In addition, it is contemplatedthat the central monitoring system will indicate a breakdown after acertain number of hours of inactivity. Thus, the following are proposedto alleviate such problems:

In a first embodiment an combination automated external defibrillator(AED) and AED Monitoring system is proposed. The combination made up ofan AED, the AED having a self-diagnostic subroutine and performing saidsubroutine at regular intervals, the AED having at least an audioindicator that indicates the results of the self-diagnostic when thediagnosis is that the AED is in need of maintenance; and a remote AEDmonitoring system, the AED monitoring system having a microphone,battery, microprocessor, and wireless communication device, wherein themicroprocessor selectively powers up the AED monitoring system prior tothe AED's self-diagnostic subroutine and utilizes the microphone tomonitor for the AED's audio indicator that the AED is in need ofmaintenance, and the microprocessor transmitting a wireless signalthrough the wireless communication device indicating whether the AED isin need of maintenance; the microprocessor selectively moving the AEDmonitoring system from an activated state to a low power state aftertransmitting the wireless signal.

In another embodiment the disclosure contemplates a method formonitoring and reporting the state of an automated externaldefibrillator (AED). The method comprised of providing an AED and an AEDmonitor; detecting a signal from the AED to establish a time and aninterval when the AED conducts a self-diagnostic test; placing the AEDmonitor in a low power state; maintaining the AED monitor in a low powerstate; powering up the AED monitor into an active state at a selectedtime before the AED conducts the self-diagnostic test; detecting anelectromagnetic signal from the AED; detecting an audible beep from theAED; wirelessly reporting a state of the AED to an on line monitoringsystem, the state of the AED determined by the electromagnetic signalfrom the AED and the audible beep from the AED; and returning the AEDmonitor to the low power state.

In another embodiment the disclosure contemplates a remote monitor foran automated external defibrillator. The remote monitor comprising acase; an antenna; a microphone; a battery; an electromagnetic coil; anda microprocessor connected to and receiving input from the antenna,microphone, and electromagnetic coil, the microprocessor receiving powerfrom the battery selectively outputting signals over the antenna; andwherein the microprocessor capable of selectively activating anddeactivating the remote monitor at a selected interval and time, theselected interval and time corresponding to

Such embodiments do not represent the full scope of the invention.Reference is made therefore to the claims herein for interpreting thefull scope of the invention. Other objects of the present invention, aswell as particular features, elements, and advantages thereof, will beelucidated or become apparent from, the following description and theaccompanying drawing figures.

DESCRIPTION OF THE DRAWINGS

The present invention may be better understood, and its numerousobjects, features, and advantages made apparent to those skilled in theart by referencing the accompanying drawings.

FIG. 1 is a front view of a remote monitor according to the presentdisclosure.

FIG. 2 is an electrical schematic of the remote monitoring systemaccording to the present disclosure.

FIG. 3 is a front view of a remote monitor and AED in an AED cabinetaccording to the present disclosure.

FIG. 4 is a perspective view of a remote monitor and AED in a carryingcase.

FIG. 5 is a flowchart and decision tree for the AED monitoring systemaccording to the present disclosure.

DETAILED DESCRIPTION

Referring now the drawings with more specificity, the present inventionessentially discloses a device for monitoring an automatic externaldefibrillator (AED). The preferred embodiments of the present inventionwill now be described with reference to FIGS. 1-5 of the drawings.Variations and embodiments contained herein will become apparent inlight of the following descriptions.

Looking now to FIG. 1, an AED monitor 1 is shown. Preferably the AEDmonitor will have an exterior case 11 which is approximately3.5″×3.5″×0.5″ but smaller and larger devices are also contemplated. Thecase 11 contains the remaining components of the AED monitor 1. The AEDmonitor 1 contains a microprocessor 12 that is connected to theremaining components of the AED monitor and essentially controls theoperation of AED monitor 1. The monitor 1 is powered by at least onebattery 13. The battery life of the AED monitor 1 is a key feature ofthe present invention. The battery 13 should be capable of remaining inoperation long enough such that the AED monitor's battery 13 does notrun out until the AED itself needs to be replaced and/or have the AEDbatteries replaced. The battery life is typically improved by placingthe AED monitor 1 into a low-power state at certain points of the day.The AED monitor also has at least two sensing mechanisms: a microphone14 and an electromagnetic coil 15. Both are preferably internallysituated so as to resist damage. The Microphone 14 is configured tolisten for beeps from an AED which indicate when the AED has failed aninternal diagnostic test. The coil 15 is typically a radio frequencycoil, more specifically a multi-turn coil, the coil is thus capable ofsensing an electromagnetic field generated by the AED. The AED monitorcommunicates via an antenna 16, being a cellular, Bluetooth, or otherwireless communication antenna. While for some operations an internalantenna 16 is preferable, in certain applications (such as when the AEDis placed into a metallic cabinet), it is preferable to have the antennaextend beyond case 11 and to be mounted to the exterior of an AEDcabinet (see, e.g. FIG. 3).

Having describe the general components of AED monitor 1, we now turn toFIG. 2 for a more detailed schematic of the workings of AED monitor 1.Generally, power management processes 101 communicate withmicroprocessor 12, the cellular communication 111, AED post detection121, chirp detection 131, and the support hardware 141. The powermanagement 101 typically will consists of a battery such as a lithiumion battery connected to a voltage regulator. As shown an aux RTC (realtime clock} power source connects the power management to themicroprocessor 12. One skilled in the art may substitute or implementother suitable substitutes for powering the AED monitor 1.

Looking now to the cellular communication systems 111, they aretypically composed of power management circuitry and a cellular module.The communication devices, as shown can be SimCon™ or other similarlink, however it should have HSDPA dual-band capabilities, while otherprotocols such as GSM/GPRS/EDGE capabilities may be preferred forcertain applications. The cellular communications 111 report to auniversal asynchronous receiver transmitter (UART} or analogous part onthe microprocessor 12.

The AED POST detection 121 systems generally relate to electromagneticcoil (or RF antenna} 15. The electromagnetic coil 15 is preferably a 100kHz-1 MHz PCB trace antenna for detecting electromagnetic fieldsemanating from the AED. Preferably a bandpass filter (e.g. 3^(rd) orderButterworth) will filter the analogue input from the antenna. The signalmay also need amplification (e.g. 2-stage Op-Amp} before reporting thesignal to an analogue-to-digital converter (ADC) on the microprocessor12.

Similarly, the AED low-battery aka “chirp” detection 131 systemsgenerally relate to Microphone 16. The microphone 16 is preferably amicrophone electret or MEMS for detecting beeps, chirps, and othersounds emitted by the AED. The signal may also need amplification (e.g.Op-Amp} before reporting the signal to an analogue-to-digital converter(ADC} on the microprocessor 12.

Other Support hardware 141 is discussed herein, such hardware may beimplemented on microprocessor 12, or be connected to the chip. Externalmemory and update storage may be connected with a serial peripheralinterface (SPI). A crystal oscillator may perform RTC capabilities, oract as a secondary check for the processor 12. In addition a JTAG (jointtest action group) or SWD (serial wire debug) Header may be implementedfor debugging.

Diagnostics 151 may also be present on the AED monitor 1, for users tointerface with the AED monitor. For example, LEDs may be used to showbattery and network status of the AED monitor. To maintain low batteryusage in the resting state, a button would cause the diagnostics 151 totrigger, thus activating the LED to show the AED monitor's 1 status.

Looking now to FIG. 3 an implementation of AED monitor 1 is shown.Automatic external defibrillator 2 and AED monitor 1 are placed inside atypical AED Cabinet 200. The door 201 is shut and the AED is visiblethrough window 202. In a typical installation a hole is made in thecabinet 200 and antenna 16 is drawn through the cabinet so it is on theexterior. This reduces interference with signals to the AED monitor 1.The monitor 1 is typically placed in the back of the cabinet 200 whereit will not interfere with operation of the AED in emergencies.

Looking now to FIG. 4 another implementation of AED monitor 1 is shown.Automatic external defibrillator 2 and AED monitor 1 are placed inside amobile AED carrying case 300. In a typical case there may be additionalbatteries 301 and a closable top 302. Some cases cause interference withsignals to the AED, however, the AED monitor 1 according to the presentinvention has several advantages discussed herein to enablecommunication outside case 300. The monitor 1 is typically placed incase 300 where it will not interfere with operation of the AED inemergencies.

FIG. 5, essentially illustrates a method 500 of operation for AEDmonitor 1. After installation into a cabinet 300, bag 400, or other AEDinstallation, AED monitor 1 should begin the setup/startup processes.The startup process then begins to detect electromagnetic (RF) signalsfrom the AED 502. This process can be improved by manually enteringvalues into the monitor 1 prior to installation. However, the monitorcan be installed without preprogramming, in such cases the AED monitor 1then detects electromagnetic signals from the AED for a minimum of 2self tests which then allows it to establish a time (T) that the AEDconducts self tests, and a frequency (F) that it conducts tests. After Tand F are established, the monitor then moves to start low-powermonitoring 503 of the AED. To enable low power monitoring, the monitor 1then sleeps 504 until the Time (T) for waking up using the T & Fvariables stored previously. The monitor 1 then inquires whether theAED's electromagnetic signal is detected 505, if not the AED is reportedas missing or dead 506. If an electromagnetic signal is detected themonitor 1 listens for an audible beep 507, if the correct beep or beepsequence is detected the monitor reports the AED is in a fault state508. If no beep is detected, the monitor 1 inquires whether it is timefor a fixed 2-way communication with a remote monitor 509, typicallythis is done on a weekly basis, but may be adjusted to a bi-weekly ormonthly basis to save battery, if it is not time the monitor 1 returnsto low power monitoring 503, if it is time to report, then a report isissued 510, then the monitor 1 returns to low-power monitoring.

Such illustrations are illustrative in nature and do not encompass allof the possible angles and types of components utilized in AED monitorsaccording to this disclosure.

INDUSTRIAL APPLICABILITY

The All AEDs turn on at a selected interval for a self inspection. Mostturn on every 24 hours for a quick check, every week for a more thoroughself inspection, and every month for a complete inspection. Theseinspections not only check the batteries and pads, but also the internalfunctions of the AED including the charge circuitry. Following theseinspections a pass or fail visual indicator is set, as well as aperiodic beep in a fault state.

Utilizing this, a basic method of operation contemplated by the AEDmonitor 1 of the present disclosure is as follows: 1) Wake up themonitoring system 1 just prior to scheduled AED self inspection; 2)Sense the turn on of the AED for its self inspection withelectromagnetic monitor 15; 3) Listen with microphone 14 for a faultsignal for a defined period of time, and if the fault signal isdiscovered a fault condition is present; 4) Report via wirelesscommunication (Wi-Fi, Bluetooth, RF, etc.) over antenna 16 the outcomeof monitoring; 5) Return monitoring system to battery 13 conservation,sleep mode.

To elaborate more on how typical AEDs 2 work and allows the monitor 1 todetect the default state of an AED; all AEDs go through a self test on aregular schedule. Most go through a 24 hour functional test thatrequires only minimal current draw from the battery. Most AEDs also gothrough a more extensive weekly test, often charging the capacitors to apercentage of their full capacity and discharging. Additionally, mostAEDs go through a 4 week or monthly extensive self test where they fullycharge and discharge the capacitors. It is this periodic turn on periodthat allows our interference sensing coil 16 to determine if the AED ispresent and if the AED battery has sufficient power to turn on. A usefulaspect of the AED self check is that it turns on at a predeterminedperiodic interval. For example, a common AED known to one skilled in theart turns on daily at 3:03 am. By knowing the specific timing of everyAED, the user can enter the AED type on setup, allowing the electronicsto sleep up to the point of test, and turn back off immediately after,preserving battery life 13. In addition, all AEDs will transmit aperiodic beep if they detect a problem during their self test Microphone14 listens for this periodic beep that will be used immediatelyfollowing the positive output from the interference coil to determinethe status of the AED, other than missing or a completely dead battery.

Installation of AED monitor 1 is kept simple so AED technicians caneasily install a monitor. Installation and setup can typically be doneby the installer's phone through Bluetooth. Wi-Fi connection and setupparameters can be done using a phone application. Setup parameters mayinclude AED model, Wi-Fi selection, fault communication method andphone/address, etc.

Accordingly, although the invention has been described by reference tocertain preferred and alternative embodiments, it is not intended thatthe novel arrangements be limited thereby, but that modificationsthereof are intended to be included as falling within the broad scopeand spirit of the foregoing disclosures and the appended drawings.

What is claimed is:
 1. An automated external defibrillator (AED)monitor, comprising: a microphone; an electromagnetic coil; acommunication system; and a microprocessor configured to: receive anelectromagnetic (RF) signal of an AED with the electromagnetic coil;identify a time that that the RF signal is detected; and set a selectedtime that the AED monitor will enter an activated state from a low powerstate, based on the identified time.
 2. The AED monitor of claim 1wherein the microprocessor is further configured to cause the AEDmonitor to enter the activated state at the selected time.
 3. The AEDmonitor of claim 2 wherein the microprocessor is further configured tocause the microprocessor to detect an audible signal from the AED withthe microphone.
 4. The AED monitor of claim 3 wherein the microprocessoris further configured to cause the microprocessor to report a status ofthe AED to a remote server, based on the detected audible signal withthe communication system.
 5. The AED monitor of claim 4 wherein themicroprocessor is further configured to report the status of the AEDcomprises a 2-way communication with the remote server.
 6. The AEDmonitor of claim 2, wherein the microprocessor is further configured tocause the AED monitor to enter the low power state.
 7. The AED monitorof claim 6 wherein the microprocessor is further configured to cause theAED monitor to enter the activated state and enter the low power stateon a periodic interval based on the recorded time.
 8. A method formonitoring an AED, comprising: receiving an RF signal at an AED monitorfrom an AED at a first time; setting a selected time based on the firsttime; placing the AED monitor in an active state based on the selectedtime; identifying, by the AED monitor, an audible signal while the AEDmonitor is in the active state.
 9. The method of claim 8 furthercomprising reporting, responsive to the identifying, one of an audiblesignal or lack of an audible signal, to a remote server.
 10. The methodof claim 9 further comprising placing the AED monitor in a low powerstate, responsive to the reporting.
 11. The method of claim 8 furthercomprising setting a periodic interval on which to place the AED monitorin the active state.
 12. The method of claim 11 further comprising,responsive to the listening, reporting to a remote server via acommunication system, during the active state of at least one periodicinterval.
 13. The method of claim 8 wherein the RF signal is received bythe AED monitor while in the active state.
 14. The method of claim 8further comprising receiving a second RF signal at the AED monitor fromthe AED at a second time.
 15. The method of claim 14 further comprisingsetting a periodic interval to place the AED monitor in the activestate, based on the first time and the second time.
 16. An automatedexternal defibrillator (AED) monitor, comprising: a microprocessorconfigured to: receive an electromagnetic (RF) signal of an AED with anelectromagnetic coil; identify a time that that the RF signal isdetected; and set a selected time that the AED monitor will enter anactivated state from a low power state, based on the identified time.17. The AED monitor of claim 16 wherein the microprocessor is furtherconfigured to cause the microprocessor to detect an audible signal fromthe AED with a microphone.
 18. The AED monitor of claim 17 wherein themicroprocessor is further configured to cause the microprocessor toreport a status of the AED to a remote server, based on the detectedaudible signal with the communication system.
 19. The AED monitor ofclaim 16, wherein the microprocessor is further configured to cause theAED monitor to enter the low power state.
 20. The AED monitor of claim19 wherein the microprocessor is further configured to cause the AEDmonitor to enter the activated state and enter the low power state on aperiodic interval based on the recorded time.